archive: homework4 homework2

homework4/src/test2.c

@@ -0,0 +1,17 @@
+// test2.c
+// 点亮数码管段b和c，让数码管显示一个数字1
+#include "homework4.h"
+
+void test2()
+{
+    set_38_2SEG();
+    BUS2B = 0; // turn on segment b
+    BUS3C = 0; // turn on segment c
+    while (1) {
+    }
+}
+
+void main()
+{
+    test2();
+}